3425 Hurukawa

3425 Hurukawa, provisional designation 1929 BD, is a stony Eoan asteroid from the outer region of the asteroid belt, approximately 25 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 29 January 1929, and named after Japanese astronomer Kiichirō Furukawa.[2][10]

3425 Hurukawa
Discovery [1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date29 January 1929
(3425) Hurukawa
Named after
Kiichirō Furukawa
(Japanese astronomer)[2]
1929 BD · 1951 GB
1971 DJ1 · 1978 PN
1979 SG1 · 1981 DW3
A903 CB
main-belt · Eos[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc114.16 yr (41,697 days)
Aphelion3.2541 AU
Perihelion2.7470 AU
3.0006 AU
5.20 yr (1,898 days)
0° 11m 22.56s / day
Physical characteristics
Dimensions21.21±0.38 km[4]
25.25 km (derived)[3]
25.36±2.8 km[5]
25.4 km[1]
27.81±0.54 km[6]
16 h[7]
24.8158±0.0402 h[8]
24.84±0.01 h[7]
0.1103 (derived)[3]
10.75±0.27[9] · 10.8[5] · 10.837±0.002 (R)[8] · 10.9[4][6] · 11.0[1][3]

Orbit and classificationEdit

Hurukawa is a member of the Eos family (606), the largest asteroid family in the outer main belt consisting of nearly 10,000 asteroids.. It orbits the Sun at a distance of 2.7–3.3 AU once every 5 years and 2 months (1,898 days). Its orbit has an eccentricity of 0.08 and an inclination of 9° with respect to the ecliptic.[1] In 1903, a first precovery was taken at the discovering observatory, extending the asteroid's observation arc by 26 years prior to its official discovery.[10]

Physical characteristicsEdit

Hurukawa has been characterized as a common S-type asteroid.[3]

Rotation periodEdit

In September 2005, a rotational lightcurve of Hurukawa was obtained from photometric observations by French astronomer Raymond Poncy. It gave a well-defined, slightly longer-than-average rotation period of 24.84±0.01 hours with a brightness variation of 0.47 in magnitude (U=3-).[7] The period was confirmed by observations taken at the U.S. Palomar Transient Factory in August 2010, which rendered a period of 24.8158±0.0402 hours and an amplitude of 0.17 (U=2),[8] superseding a third period of 16 hours from a fragmentary lightcurve obtained by French astronomer René Roy in 2007 (U=1).[7]

Diameter and albedoEdit

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Hurukawa measures between 21.3 and 27.8 kilometers in diameter and its surface has an untypically low albedo between 0.10 and 0.17.[4][5][6] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.11 and a diameter of 25.3 kilometers.[3]


This minor planet was named in honor of Japanese Kiichirō Furukawa (1929–2016), who was an astronomer at Tokyo Astronomical Observatory and an observer and discoverer of minor planets himself.[2] The official naming citation was published by the Minor Planet Center on 16 December 1986 (M.P.C. 11443).[11]


  1. ^ a b c d e "JPL Small-Body Database Browser: 3425 Hurukawa (1929 BD)" (2017-03-31 last obs.). Jet Propulsion Laboratory. Retrieved 17 June 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(3425) Hurukawa". Dictionary of Minor Planet Names – (3425) Hurukawa. Springer Berlin Heidelberg. p. 286. doi:10.1007/978-3-540-29925-7_3425. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f g "LCDB Data for (3425) Hurukawa". Asteroid Lightcurve Database (LCDB). Retrieved 19 July 2016.
  4. ^ a b c d Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 19 July 2016.
  5. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
  6. ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 17 October 2019. (online, AcuA catalog p. 153)
  7. ^ a b c d Behrend, Raoul. "Asteroids and comets rotation curves – (3425) Hurukawa". Geneva Observatory. Retrieved 19 July 2016.
  8. ^ a b c Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 19 July 2016.
  9. ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 19 July 2016.
  10. ^ a b "3425 Hurukawa (1929 BD)". Minor Planet Center. Retrieved 19 July 2016.
  11. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 19 July 2016.

External linksEdit